High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon

Andrius Zemaitis; Justinas Miksys; Mantas Gaidys; Paulius Gecys; Mindaugas Gedvilas

doi:10.1088/2053-1591/ab0b12

High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon

Andrius Zemaitis, Justinas Miksys, Mantas Gaidys, Paulius Gecys, Mindaugas Gedvilas (Corresponding Author)

Research output: Contribution to journal › Article › Academic › peer-review

21 Citations (Scopus)

18 Downloads (Pure)

Abstract

Bio-inspired surfaces are able to decrease friction with fluids and gases. The most recognizable are shark-skin-like riblet surface structures. Such bio-inspired surfaces can be formed by the laser ablation technique. In this work, bio-inspired riblet surfaces with grooves were formed using picosecond ultraviolet laser ablation on pre-heated polytetrafluoroethylene (PTFE) at various sample temperatures. The ablation of hot PTFE was found to be 30% more efficient than the conventional laser structuring at the room temperature. The friction of structured PTFE surfaces with the flowing air was investigated by using drag a measurement setup. Results show the decrease of friction force by 6% with dimensionless riblet spacing around 14-20.

Original language	English
Article number	065309
Journal	Materials Research Express
Volume	6
Issue number	6
Early online date	15 Mar 2019
DOIs	https://doi.org/10.1088/2053-1591/ab0b12
Publication status	Published - 15 Mar 2019

Keywords

PTFE
Teflon
Direct laser ablation
Drag reduction
Pre-heated
Riblets
Shark-skin-like
n/a OA procedure

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10.1088/2053-1591/ab0b12

Cite this

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title = "High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon",

abstract = "Bio-inspired surfaces are able to decrease friction with fluids and gases. The most recognizable are shark-skin-like riblet surface structures. Such bio-inspired surfaces can be formed by the laser ablation technique. In this work, bio-inspired riblet surfaces with grooves were formed using picosecond ultraviolet laser ablation on pre-heated polytetrafluoroethylene (PTFE) at various sample temperatures. The ablation of hot PTFE was found to be 30% more efficient than the conventional laser structuring at the room temperature. The friction of structured PTFE surfaces with the flowing air was investigated by using drag a measurement setup. Results show the decrease of friction force by 6% with dimensionless riblet spacing around 14-20.",

keywords = "PTFE, Teflon, Direct laser ablation, Drag reduction, Pre-heated, Riblets, Shark-skin-like, n/a OA procedure",

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T1 - High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon

AU - Zemaitis, Andrius

AU - Miksys, Justinas

AU - Gaidys, Mantas

AU - Gecys, Paulius

AU - Gedvilas, Mindaugas

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Bio-inspired surfaces are able to decrease friction with fluids and gases. The most recognizable are shark-skin-like riblet surface structures. Such bio-inspired surfaces can be formed by the laser ablation technique. In this work, bio-inspired riblet surfaces with grooves were formed using picosecond ultraviolet laser ablation on pre-heated polytetrafluoroethylene (PTFE) at various sample temperatures. The ablation of hot PTFE was found to be 30% more efficient than the conventional laser structuring at the room temperature. The friction of structured PTFE surfaces with the flowing air was investigated by using drag a measurement setup. Results show the decrease of friction force by 6% with dimensionless riblet spacing around 14-20.

AB - Bio-inspired surfaces are able to decrease friction with fluids and gases. The most recognizable are shark-skin-like riblet surface structures. Such bio-inspired surfaces can be formed by the laser ablation technique. In this work, bio-inspired riblet surfaces with grooves were formed using picosecond ultraviolet laser ablation on pre-heated polytetrafluoroethylene (PTFE) at various sample temperatures. The ablation of hot PTFE was found to be 30% more efficient than the conventional laser structuring at the room temperature. The friction of structured PTFE surfaces with the flowing air was investigated by using drag a measurement setup. Results show the decrease of friction force by 6% with dimensionless riblet spacing around 14-20.

KW - PTFE

KW - Teflon

KW - Direct laser ablation

KW - Drag reduction

KW - Pre-heated

KW - Riblets

KW - Shark-skin-like

KW - n/a OA procedure

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U2 - 10.1088/2053-1591/ab0b12

DO - 10.1088/2053-1591/ab0b12

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SN - 2053-1591

VL - 6

JO - Materials Research Express

JF - Materials Research Express

IS - 6

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ER -

High-efficiency laser fabrication of drag reducing riblet surfaces on pre-heated Teflon

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Keywords

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